William Lee Davidson Ewing (August 31, 1795 – March 25, 1846) was a politician from Illinois who served partial terms as the fifth governor of the state and as U.S. Senator. Ewing was born in Paris, Kentucky and practiced law in Shawneetown, Illinois. James Monroe appointed him to be a land office receiver in Vandalia in 1820. He served as a Colonel of the "Spy Battalion" during the Black Hawk War. In 1830, he was elected to serve in the state House of Representatives as Speaker. He had previously been the clerk of the House. From 1832 to 1834, he was a State Senator, serving as President pro tempore of the State Senate in 1832. In 1833, he was also named acting Lieutenant Governor of Illinois and served as Governor of Illinois for fourteen days in 1834, the shortest gubernatorial term in